HEADSC 2nbc SEQCRD A W TRP TRP 1 1 C C 0 SEQCRD A C CYS CYS 2 2 C C 0 SEQCRD A A ALA ALA 3 3 C C 0 SEQCRD A S SER SER 4 4 C C 0 SEQCRD A G GLY GLY 5 5 C C 0 SEQCRD A C CYS CYS 6 6 C C 0 SEQCRD A R ARG ARG 7 7 E E 0 SEQCRD A K LYS LYS 8 8 E E 0 SEQCRD A K LYS LYS 9 9 C C 0 SEQCRD A R ARG ARG 10 10 C C 0 SEQCRD A H HIS HIS 11 11 C C 0 SEQCRD A G GLY GLY 12 12 C C 0 SEQCRD A G GLY GLY 13 13 C C 0 SEQCRD A C CYS CYS 14 14 E E 0 SEQCRD A S SER SER 15 15 E E 0 SEQCRD A C CYS CYS 16 16 C C 0 SEQCRD A X NH2 NH2 17 17 C C 0 PARAME method NMR PARAME resolution NA PARAME R-factor NA PARAME FreeR-factor NA